I had a more impressive image in my books but can't remeber where.
here is an extract from the excellent website :
http://www.quarry.nildram.co.uk/tankammo4.htm
Legend : WW2 AIRCRAFT GUN AMMUNITION (2)
20x101RB (Oerlikon FFL/IJN Type 99-2), 20x110RB (Oerlikon FFS/HS Type 7, 9),
20x110 (Hispano HS 404), 20x125 (IJA Ho-1, Ho-3), 23x152B (23mm VYa),
30x90RB (MK 10
, 30x184B (MK 101/MK 103), 37x145R (US M4, M10), 37x195 (NS-37)
You can see on this same website the comparison btw HS404 and MGFF M